Our older 585 PI just stopped yesterday... is there a fuse or a reset button? We have not experience any problems with this great treadmill until now... no unusual sounds or anything like that... please help.. my husband must use the tread mill everyday for his heart condition and we don't have enough money to buy a new one... again, please help me. We probably bought this around 2000 and just starting really using it this past year. Thank you, Patty